Chloramination

Similar term(s): chloraminated water, chloraminated drinking water.

Definition:

The treatment of drinking water with a chloramine disinfectant. Both chlorine and small amounts of ammonia are added to the water one at a time which react together to form chloramine (also called combined chlorine), a long lasting disinfectant. As such, chloramine disinfection is sometimes used in large distribution systems. Chloraminated water is toxic to fish and must not be used for kidney dialysis.

Source: GreenFacts

More:

In the US especially, chloraminated drinking water treatment systems are tending to replace previously chlorinated drinking water systems.